16403648 has 14 divisors (see below), whose sum is σ = 32551116. Its totient is φ = 8201792.

The previous prime is 16403609. The next prime is 16403671. The reversal of 16403648 is 84630461.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128090 + ... + 128217.

Almost surely, 2^16403648 is an apocalyptic number.

It is an amenable number.

16403648 is a deficient number, since it is larger than the sum of its proper divisors (16147468).

16403648 is an equidigital number, since it uses as much as digits as its factorization.

16403648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256319 (or 256309 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 16403648 is about 4050.1417259153. The cubic root of 16403648 is about 254.0856552830.

The spelling of 16403648 in words is "sixteen million, four hundred three thousand, six hundred forty-eight".